Đỗ Nguyên Hưng on 02/26/2007 at 8:49 am Uhr
 THE MOON I see the moon, The moon sees me, God bless the moon, And God bless me. - (Nursery Rhyme) Size The moon, Earth's only natural satellite. It is fifth in diameter among planetary satellites, more than two-thirds as large as Mercury, and more than three times the diameter of the largest asteroid. It is over one-fourth the size of the earth, with a diameter of 2160 miles (3476 kilometers). The Moon makes one complete orbit about the Earth every 27.3 days, Distance Since the moon is a relatively near neighbor, we can measure its distance easily by geometrical methods. The average is 238,857 miles (384,403 kilometers). Brightness Next to the sun, the full moon is the brightest object in the heavens. However, its surface is rough and brownish and reflects light very poorly. In fact, the moon is about the poorest reflector in the solar system. The moon relects only 7% of the sunlight . Event The United States' Apollo program achieved the first (and only) manned missions to the Moon, culminating in 6 landings between 1969 and 1972. On December 4, 2006, NASA outlined plans for a permanent base on the Moon as part of preparation for a voyage to Mars. Construction of the base is scheduled to take approximately five years, with the first preliminary missions beginning by 202 That orbed' maiden With white fire laden Whom mortals call the Moon. - (Shelley) |
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